value quality siderealorsynodic author ref method 2.4490 3 Synodic Pravec 2012Icar..218..125P Lightcurve 2.4496 3 Synodic Pravec 2012Icar..218..125P Lightcurve 2.4497 3 Synodic Pravec 2012Icar..218..125P Lightcurve 2.4497 3 Synodic Pray 2006CBET..617....1P Lightcurve